Cultivator



(No Model.)

R. WILSON. GULTIVATDR.

No. 418,800. Patented Dec. 8l, 1889..

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UNTTED STATES PATENT OFFICE.

ROBERT lVILSON, OF ALLEN, PENNSYLVANIA.

CU LTIVATO R.

SPECIFICATION forming part of Letters Patent No. 418,300, dated December 31, 1889.

Application filed October 22, 1889. Serial No. 327,764. (No model.)

To all whom it may concern:

Be it known that I, ROBERT` WILSON, a citizen of the United States, residing at Allen, in the county of Cumberland and State of Pennsylvania, have invented a new and useful Cultivator,ot' 4which the following is a specification.

This invention has relation to that class of cultivator-teeth in which a spring and hinged levers are employed for returning the tooth or shovel to position after the same has been rearwardly swung, as caused by encountering` an obstruction calculated to break the tooth if the same were rigidly connected to the beam; and the objects and advantages of the invention will hereinafter appear, and the -novel features thereof be particularly pointed out in the claims.

Referring to the drawings, Figure 1 is a side elevation ot a cultivator tooth or shovel mounted upon a beam in accordance with my invention. Eig. 2 is a similar View illustrating the position of the parts with the tooth swung to the rear. Fig. 3 is a rear elevation. Fig. 4 is a section on the line m a'. of Eig. 1.

Like numerals of reference indicate like parts in all the figures oi' the drawings.

1 represents the beam, the rear end of which is curved downwardly, as is usual, and 2 represents the shovel-standard, formed of strap met-al Iand pivoted at each side of the lower end of the beam by a bolt 3, said standard being continued and curved in rear of the pivot, approximating a bell-crank in shape.

4 represents the shovel-point, the rear end of which is provided with a rearwardly-disposed threaded stud 5, upon which is mounted a clip 6, embracing the opposite .rear edges of the standard, and upon the stud is threaded threaded rod 16, the rear end of which is supported and adapted to reciprocate in a perforated bracket 1.7, the upper end of which. is securely bolted, as at 18, to the beam. A coiled spring 19 encircles the rod and bears against the face of the bracket, and a plate 2O is mounted on t-he rod and bears against the rear end of the coiled spring and against the plate, and mounted in the threads of the nut is a set-nut 2l, adapted to compress the spring against its tension. The tendency of the spring, as will be apparent from the foregoing description, is to maintain the part-s in the position shown in Fig. 1; but it is apparent that should the shovel meet with an obstruction sufficiently great to operate or overcome the tendency of the spring said spring will yield or compress, and the parts will assume the position shown in Fig. 2, in which the shovel-standard is swung to the rear and the spring compressed. Vhen the obstruction has been passed, the tendency of the spring forces the various links back to their original positions, as will be readilT understood.

Having thus described my invention, I claim- The combination,with the beam and the oppositely-pivoted bell-crank standard 2, of a pair of links Si, pivotally connected to the rear end of the standard, a pair ot bellcranks 10, pivoted to the beam and having their lower ends pivotally connected to the upper end of the links, a pair of horizontal links 13, pivoted at their rear ends to theupper ends of the bell-cranks and embracing the beam, and a pair of bell-cranks 12W, pivoted at their rear ends to the front ends of said links and at their forward ends to the beam,a bolt 16, passed through said bell- In testimony that I claim the foregoing as cranks, a threaded rod 16:", having` its rear my own I have hereto affixed my signature in xo end -pivoted to the bolt and its opposite end presence of two Witnesses.

passed throu O'h and supported by a perforated bracket 17, absprng 19,n1ounted on the bolt, ROBERT WILSON a plate 20, mounted on the spring,and an ad- Witnesses:

justin g-nut 21, mounted over the rod and bear H. WV. LANDIS,

in g n pon the plate, substantially as speoied. NV. J. CEAUDY. 

